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This changed with the invention of the first telescope. A telescope is a tool that allows you to see things that are far away. Telescopes gave people the first chance to see things in space more closely. A man named Galileo was the first person to use a telescope to look at the night sky. What he saw changed our view of the Universe. It was the first time that planets were seen as more than just lights in the night sky. With his telescope, Galileo saw that there were many more stars in the sky than we could see with our eyes alone. He could see that there were mountains on the moon and that some planets had moons of their own. |
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